کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6323091 1619733 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A batch assay to measure microbial hydrogen sulfide production from sulfur-containing solid wastes
ترجمه فارسی عنوان
تست دسته ای برای اندازه گیری تولید سولفید هیدروکربوری از ضایعات جامد حاوی گوگرد
کلمات کلیدی
سولفید هیدروژن، دفن زباله، زباله های ساخت و ساز و تخریب، خاکستر سولفوریزاسیون گاز دودکش، زباله جامد شهری، ذغال سنگ احتراق پرواز خاکستر،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- A lab-scale assay to estimate H2S production from solid wastes was developed.
- High H2S concentrations depressed both methane production and sulfate reduction.
- Base traps to sequester H2S reduced its toxic effect.
- H2S production potential of different solid wastes was measured.
- Not all sulfur in solid wastes is converted to H2S through biotransformation.

Large volumes of sulfur-containing wastes enter municipal solid waste landfills each year. Under the anaerobic conditions that prevail in landfills, oxidized forms of sulfur, primarily sulfate, are converted to sulfide. Hydrogen sulfide (H2S) is corrosive to landfill gas collection and treatment systems, and its presence in landfill gas often necessitates the installation of expensive removal systems. For landfill operators to understand the cost of managing sulfur-containing wastes, an estimate of the H2S production potential is needed. The objective of this study was to develop and demonstrate a biochemical sulfide potential (BSP) test to measure the amount of H2S produced by different types of sulfur-containing wastes in a relatively fast (30 days) and inexpensive (125 mL serum bottles) batch assay. This study confirmed the toxic effect of H2S on both sulfate reduction and methane production in batch systems, and demonstrated that removing accumulated H2S by base adsorption was effective for mitigating inhibition. H2S production potentials of coal combustion fly ash, flue gas desulfurization residual, municipal solid waste combustion ash, and construction and demolition waste were determined in BSP assays. After 30 days of incubation, most of the sulfate in the wastes was converted to gaseous or aqueous phase sulfide, with BSPs ranging from 0.8 to 58.8 mL H2S/g waste, depending on the chemical composition of the samples. Selected samples contained solid phase sulfide which contributed to the measured H2S yield. A 60 day incubation in selected samples resulted in 39-86% additional sulfide production. H2S production measured in BSP assays was compared with that measured in simulated landfill reactors and that calculated from chemical analyses. H2S production in BSP assays and in reactors was lower than the stoichiometric values calculated from chemical composition for all wastes tested, demonstrating the importance of assays to estimate the microbial sulfide production potential of sulfur-containing wastes.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 551–552, 1 May 2016, Pages 23-31
نویسندگان
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